Assessment of Techcrete : a concrete repair material and joint sealant.
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Assessment of Techcrete : a concrete repair material and joint sealant.

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  • English

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    • Abstract:
      Joint sealing and resealing is a commonly performed concrete pavement maintenance activity that serve



      purposes. First, it minimizes water infiltration; second, it prevents intrusion of solid materials in the joints. There

      are many sealants available for resealing concrete joints including hot


      poured, rubberized asphalt sealants and

      silicone sealants

      . According to a Federal Highway Administration technology brief, “the hot


      poured, rubberized

      asphalt sealants are less expensive than silicone materials but generally have shorter life expectancies (typically, 4

      to 8 years for hot


      poured sealants and 5 t

      o 10 for silicone sealants) [1].

      In the fall of 2007, the City of Winooski resealed some of the pavement joints located along US Route 2 and 7 as

      part of their periodic preventative maintenance work, with a new hot


      poured product, TechCrete, manufactured


      Crafco. According to Crafco, this flexible material is a hot


      poured product for concrete repairs, which provides high

      tensile strength and high compressive resistance. It is comprised of a combination of several resins, polymers,

      and aggregate. In ad

      dition, it has proven to provide a long


      term life span in most applications. According to the

      manufacturer, once the material has properly cured, the materials will not de


      bond or crack while remaining flexible

      during the expansion and contraction of the

      adjacent concrete slabs. Additionally, the affected lane can be open to

      traffic within one hour of application.

      In 2008, Crafco contacted VTrans to have TechCrete added to the Approved Products list. This study is an

      evaluation of the product. VTran

      s selected the Winooski site and a site in South Burlington where a concrete

      pavement was placed in 1997 that exhibited similar deterioration, to conduct a field evaluation of the product.

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